In the original Java Q&A, I specified that you need three elements to generate and listen to custom events ... as author of Sams Teach Yourself Object-Oriented Programming in 21 Days (Sams ...

Object-oriented systems are usually partitioned into layers of related ... However, they can register themselves as event listeners with classes in lower levels through a generic interface. A ...

But why reinvent the wheel to implement a data encoding and decoding mechanism? Java’s inbuilt concept of serialization, does all this for you, for the very objects created by your application ...